If you receive an Error 30003 message, it means there's an issue in the backend that may interfere with publishing your site.
If you experience this issue, please contact Customer Care so that we can resolve the error.
When contacting Wix Customer Care, include the following:
Your site name or URL.
The steps you took before receiving the error message.
This article is credited to the Wix team - https://support.wix.com/ and we thank them for that!